CO2 is heavier than air but CO is slightly lighter than air (1.145 g/cm^3 versus roughly 1.2 g/cm^3) On Tue, Nov 28, 2017 at 10:31 PM, Richard Pope wrote: > Allen, > Very true. With our tarp setup it was completely open at the bottom > to insure that there was plenty of air for the heater and for us. Since > CO2 and CO are heavier than air they would fall out of the bottom of the > tarps and protect us from being poisoned by them. This is slightly > different from a closed building where these can build up to toxic > levels very quickly. > Thanks, > rich! > > On 11/28/2017 9:16 PM, Allen Mulvey wrote: > > Much of the need for a "well ventilated area" is not so much > > for fear of CO but rather a need for fuel. In a well sealed > > environment you can burn off all your oxygen and asphyxiate > > yourself. > > > > Allen > > > > -----Original Message----- > > From: piclist-bounces@mit.edu > > [mailto:piclist-bounces@mit.edu] On Behalf Of > > mail@crcomp.net > > Sent: Tuesday, November 28, 2017 9:33 PM > > To: piclist@mit.edu > > Subject: Re: [OT] Best garage heating option > > > > RussellMc wrote: > >> On 28 November 2017 at 18:49, Gary Crowell > > > > > --- > This email has been checked for viruses by Avast antivirus software. > https://www.avast.com/antivirus > > -- > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .